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为了提高单旋翼带尾桨直升机的低空飞行安全性,利用横流风扇流动控制技术,设计了一种可以替代单旋翼直升机尾桨的反扭装置。通过风洞试验验证了该装置具有产生侧向力的特性,同时建立了该装置的数值模拟计算方法,得出了横流风扇转速、旋翼下洗流和前飞来流对该反扭装置的气动特性影响较大,初步分析了该反扭装置的侧向力的来源,证明了可以通过控制横流风扇转速来控制反扭装置侧向力的大小,因此应用于直升机的反扭系统是可行的。
In order to improve the low flight safety of a single-rotor tail rotor helicopter, a reverse torsion device that can replace the single-rotor helicopter tail rotor is designed by using cross-flow fan flow control technology. Through the wind tunnel test, the device has the characteristic of generating lateral force. At the same time, the method of numerical simulation of the device is established. The effects of the cross-flow fan speed, the rotor underwash and the forward flight on the aerodynamic It is proved that the lateral force of the anti-twist device can be controlled by controlling the cross-flow fan speed. Therefore, it is feasible to apply the anti-twist system to the helicopter.